Hemisphere kits
The GRAS hemispheres are compliant with the ISO 3744, 3745 and 3746 (ANSI S12.54, S12.55, S12.56) standards and accommodate for 4, 10 and 20 positions. These are clearly marked to ease the mounting and maintain measurement repeatability.
Two hemisphere structures are available; a 1 m measurement radius and a 2 m measurement radius. Each structure is available in CCP, LEMO and LEMO lownoise variants.
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 138 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm
67HA 1 m CCP Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 149 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm
67HA 1 m LEMO Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 110 dB
Sensitivity: 850 mV/Pa
Measures incl. feet: Diagonal 2716 mm Height 1283 mm
67HA 1 m LEMO Low-noise Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dBA to 138 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm
67HB 2 m CCP Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
Freq range: 3.15 Hz to 20 kHz
Dyn range: 17 dB(A) to 149 dB
Sensitivity: 50 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm
67HB 2 m LEMO Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
Freq range: 10 Hz to 16 kHz
Dyn range: 6.5 dB(A) to 110 dB
Sensitivity: 850 mV/Pa
Measures incl. feet: Diagonal 4716 mm Height 2283 mm
67HB 2 m LEMO Low-noise Hemisphere kit
The GRAS hemispheres will hold and position the measurement microphones according to the standards and have been designed with focus on your workflow; They are very easy to assemble and it is easy to position and access the DUT. Furthermore, in best GRAS tradition they are optimized acoustically for..
